How Long Do I Wait to Sand Latex Paint? | eHow
Sanding Latex Paint. Use 120- or 150-grit sandpaper or a fine to medium flexible sanding sponge to sand fresh latex paint. You can use coarser grits for sanding cured latex paint, but it takes up to 30 days for latex paint to cure completely hard and coarser grits will scratch or remove fresh paint. Sand with a light touch.
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